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Diffstat (limited to 'attic/muse2-oom/muse2/awl/aslider.cpp')
| -rw-r--r-- | attic/muse2-oom/muse2/awl/aslider.cpp | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/attic/muse2-oom/muse2/awl/aslider.cpp b/attic/muse2-oom/muse2/awl/aslider.cpp new file mode 100644 index 00000000..b48ccbe0 --- /dev/null +++ b/attic/muse2-oom/muse2/awl/aslider.cpp @@ -0,0 +1,244 @@ +//============================================================================= +// Awl +// Audio Widget Library +// $Id:$ +// +// Copyright (C) 2002-2006 by Werner Schweer and others +// +// This program is free software; you can redistribute it and/or modify +// it under the terms of the GNU General Public License version 2. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +//============================================================================= + +#include "fastlog.h" +#include "aslider.h" + +#include <QKeyEvent> +#include <QWheelEvent> + +namespace Awl { + +//--------------------------------------------------------- +// AbstractSlider +//--------------------------------------------------------- + +AbstractSlider::AbstractSlider(QWidget* parent) + : QWidget(parent), _scaleColor(Qt::black), _scaleValueColor(Qt::blue) + { + _id = 0; + _value = 0.5; + _minValue = 0.0; + _maxValue = 1.0; + _lineStep = 0.1; + _pageStep = 0.2; + _center = false; + _invert = false; + _scaleWidth = 4; + _log = false; + _integer = false; + } + +//--------------------------------------------------------- +// setEnabled +//--------------------------------------------------------- + +void AbstractSlider::setEnabled(bool val) + { + QWidget::setEnabled(val); + update(); + } + +//--------------------------------------------------------- +// setCenter +//! If the center flag is set, a notch is drawn to +//! show the center position. +//--------------------------------------------------------- + +void AbstractSlider::setCenter(bool val) + { + if (val != _center) { + _center = val; + update(); + } + } + +//!-------------------------------------------------------- +// setScaleWidth +//--------------------------------------------------------- + +void AbstractSlider::setScaleWidth(int val) + { + if (val != _scaleWidth) { + _scaleWidth = val; + update(); + } + } + +//--------------------------------------------------------- +// setScaleColor +//--------------------------------------------------------- + +void AbstractSlider::setScaleColor(const QColor& c) + { + if (c != _scaleColor) { + _scaleColor = c; + update(); + } + } + +//--------------------------------------------------------- +// setScaleValueColor +//--------------------------------------------------------- + +void AbstractSlider::setScaleValueColor(const QColor& c) + { + if (c != _scaleValueColor) { + _scaleValueColor = c; + update(); + } + } + +//--------------------------------------------------------- +// wheelEvent +//--------------------------------------------------------- + +void AbstractSlider::wheelEvent(QWheelEvent* ev) + { + double div = 120.0; + if (ev->modifiers() & Qt::ShiftModifier) + _value += (ev->delta() * pageStep()) / div; + else + _value += (ev->delta() * lineStep()) / div; + if (_value < _minValue) + _value = _minValue; + else if (_value > _maxValue) + _value = _maxValue; + valueChange(); + update(); + } + +//--------------------------------------------------------- +// keyPressEvent +//--------------------------------------------------------- + +void AbstractSlider::keyPressEvent(QKeyEvent* ev) + { + double oval = _value; + + switch (ev->key()) { + case Qt::Key_Home: _value = _minValue; break; + case Qt::Key_End: _value = _maxValue; break; + case Qt::Key_Up: + case Qt::Key_Left: _value += lineStep(); break; + case Qt::Key_Down: + case Qt::Key_Right: _value -= lineStep(); break; + case Qt::Key_PageDown: _value -= pageStep(); break; + case Qt::Key_PageUp: _value += pageStep(); break; + default: + break; + } + if (_value < _minValue) + _value = _minValue; + else if (_value > _maxValue) + _value = _maxValue; + + if (oval != _value) { + if (_integer && (rint(oval) == rint(_value))) + return; + valueChange(); + update(); + } + } + +//--------------------------------------------------------- +// setValue +//--------------------------------------------------------- + +void AbstractSlider::setValue(double val) + { + if (_log) { + if (val == 0.0f) + _value = _minValue; + else { + _value = fast_log10(val) * 20.0f; + if (_value < _minValue) + _value = _minValue; + } + } + else if (_integer) + _value = rint(val); + else + _value = val; + update(); + } + +//--------------------------------------------------------- +// valueChange +//--------------------------------------------------------- + +void AbstractSlider::valueChange() + { + emit valueChanged(value(), _id); + } + +//--------------------------------------------------------- +// value +//--------------------------------------------------------- + +double AbstractSlider::value() const + { + if (_log) + return pow(10.0, _value*0.05f); + if (_integer) + return rint(_value); + return _value; + } + +//--------------------------------------------------------- +// minLogValue +//--------------------------------------------------------- + +//double AbstractSlider::minValue() const { +// return _log ? pow(10.0, _minValue*0.05f) : _minValue; +//} + +//--------------------------------------------------------- +// setMinLogValue +//--------------------------------------------------------- + +void AbstractSlider::setMinLogValue(double val) { + if (_log) { + if (val == 0.0f) _minValue = -100; + else _minValue = fast_log10(val) * 20.0f; + } + else _minValue = val; +} + +//--------------------------------------------------------- +// maxLogValue +//--------------------------------------------------------- + +//double AbstractSlider::maxValue() const { +// return _log ? pow(10.0, _maxValue*0.05f) : _maxValue; +//} + +//--------------------------------------------------------- +// setMaxLogValue +//--------------------------------------------------------- + +void AbstractSlider::setMaxLogValue(double val) { + if (_log) { + _maxValue = fast_log10(val) * 20.0f; + } + else _maxValue = val; +} + +} |